Now they will be able to identify genes for any desired trait, improving quality,nutritional value and disease resistance.

VOA: special.2009.11.03

So this--the seeking out fat, sugar, and variety is a highly evolved, adaptive evolutionary trait.

脂肪,糖以及饮食的多样性的与,适应进化的特性是分不开的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

I assume what Socrates means by that is though each individual will, each of us, embody all three features of soul, appetite, spirit, and reason, only one of these will be the dominate trait in each of us.

我假定苏格拉底是指,虽然每个个体，我们每一个人，都将体现灵魂,欲望，意志与理性的全部三种特质，而仅有其中一项,会主宰我们每一个人。

耶鲁公开课 - 政治哲学导论课程节选